Dynamic Ram 200 vs Zero

BruceUSA schrieb am 27.12.2018 um 17:31 Uhr

I was ask to run the test and play back MP4 file. I know there are people having Vegas crash problems and forced them to set the video preview dynamic ram to zero in order to finish rendering their project without crash. I can not say why that is the case for some people. But I have been using vegas since VP pro 8 back in 2009. I never have to change dynamic ram to anything. I always keep mine at default. Changing dynamic ram to zero is actually slow down the rendering. I rendering out this 4K test footage with dynamic ram at default. I am getting 40+ frames vs 31 frames with dynamic ram set to zero

https://vimeo.com/308430304

Kommentare

bitman schrieb am 28.12.2018 um 10:07 Uhr

@BruceUSA

The reason that you do not have issues with dynamic RAM 200 at rendering is probably because:

you do not have an NVIDEA videocard
are using a clean clip without FX and temporal edits.

Of my experience over the years on different PC hardware and different Vegas builds (old and new) I would have either crashes (seems to occur less with more mature SW/drivers and/or hardware), or artefacts like flickering, black frames etc.. in the rendered output with dynamic RAM set to 200. This can be easily simulated (or provoked if you like), by adding a few special effects plugins (e.g. NewblueFX) and (this is important) together with a temporal effect (like using the Vegas speeding up of the clip). I have a tread in this forum about this: https://www.vegascreativesoftware.info/us/forum/dynamic-ram-preview-max-not-zero-render-issue-vp16-and-vp15-etc--113652/#ca702427

This is not solved yet, it is still an issue in the latest build 352.

I have ticket open [Ticket#2018120517007791], no respond yet.

As a final note, I do not recall having such issues on a clean (with no effects) render with dynamic RAM set.

OldSmoke schrieb am 28.12.2018 um 10:36 Uhr

The reason that you do not have issues with dynamic RAM 200 at rendering is probably because:

you do not have an NVIDEA videocard

are using a clean clip without FX and temporal edits.

Maybe that is true for Nvidia cards after Fermi. I used to have Nvidia cards, GTX560, 570 and 2x GTX580 and never had a crash with the 200 default value. And yes, these projects contained a lot of FX, Pan/Crop, Track Motion and even a bit of compositing. In fact, I came across a bug with AMD cards during SVP12 & 13 whereby a combination of Pan/Crop and Track Motion on the top track would result in flickering of the underlying track. That was resolved with later GPU drivers.

There may also be a similar bug in VP16 but unconfirmed. The current bug however does go away with a Preview Ram of 0 or CPU only rendering or setting project properties to 32bit video levels or higher.

In any case, I never had a crash with the default 200.